Thousands-blocks in 337-443

This prefix’s ten 1,000-number blocks and who holds each — 10 on record · from the daily NANPA thousands-block report, 09/20/2026

Full prefixes (NXX) Thousands-blocks (1,000-number pools)

The ten 1,000-number thousand-blocks inside prefix 337-443 and who was initially assigned each. Under pooling these blocks often belong to different carriers — the single prefix-level “assignee” is usually just the pool / code holder, not who holds the numbers. ← all 337 blocks

Most active assignees, all time — NPA 337

METROPCS, INC. 3

LEVEL 3 COMMUNICATIONS, LLC - LA 2

BANDWIDTH.COM CLEC, LLC - LA 2

TELEPORT COMMUNICATIONS AMERICA LA - LLC 1

NUSO, LLC 1

New assignments by month Sep 2026 Aug 2026 Jul 2026 Jun 2026 May 2026 Apr 2026 Mar 2026 Feb 2026 Jan 2026 Dec 2025 Nov 2025 Oct 2025

Recent thousands-block assignments
Assigned	Thousands-block	Last 4 digits	Status	Assignee	OCN	Rate center	State
2013-06-19	337-443-0XXX	0000–0999	Assigned	BANDWIDTH.COM CLEC, LLC - LA	153F	LAFAYETTE	LA
2012-11-02	337-443-1XXX	1000–1999	Assigned	NUSO, LLC	551G	LAFAYETTE	LA
2013-06-19	337-443-2XXX	2000–2999	Assigned	BANDWIDTH.COM CLEC, LLC - LA	153F	LAFAYETTE	LA
2013-09-25	337-443-3XXX	3000–3999	Assigned	METROPCS, INC.	5562	LAFAYETTE	LA
2013-08-21	337-443-4XXX	4000–4999	Assigned	LEVEL 3 COMMUNICATIONS, LLC - LA	3232	LAFAYETTE	LA
2013-09-25	337-443-5XXX	5000–5999	Assigned	METROPCS, INC.	5562	LAFAYETTE	LA
2013-03-07	337-443-6XXX	6000–6999	Assigned	TELEPORT COMMUNICATIONS AMERICA LA - LLC	653C	LAFAYETTE	LA
2014-07-24	337-443-7XXX	7000–7999	Assigned	LEVEL 3 COMMUNICATIONS, LLC - LA	3232	LAFAYETTE	LA
2013-09-25	337-443-8XXX	8000–8999	Assigned	METROPCS, INC.	5562	LAFAYETTE	LA
2013-02-26	337-443-9XXX	9000–9999	Assigned	LOUISIANA COMPETITIVE TELECOMMUNICATIONS, INC.	4930	LAFAYETTE	LA

Source: NANPA Thousands Block Assignment Report (All Regions, Public), file date 09/20/2026 — Tier A primary source, refreshed on every import. Viewing is free; bulk downloads require a membership.